Supco ST01 Stainless Steel Pocket Dial Thermometer, 5" Stem, 1" Dial, -40 to 160 Degrees F PORTABLE THERMOMETER - Pocket dial thermometer with round, 1 inch dial. Temperature range -40F to 160F BONUSES INCLUDED - Supco ST01 pocket dial thermometer comes with a protective sheath with convenient pocket clip HIGHEST-QUALITY PARTS - Supco parts are built to last and a popular choice among repair technicians and DIYers.